Fuel oil combustion treatment method for thermal desorption remediation of polluted soil

Abstract

The invention discloses a fuel oil combustion treatment method for thermal desorption remediation of polluted soil, which comprises the following steps: atomizing fuel oil in a fuel oil burner, then making hte atomized fuel oil contact and mixed with combustion air, conducting igniting by an ignition electrode for continuous and stable combusting in a combustion chamber, feeding generated high-temperature flue gas into a thermal desorption remediation system for conduction heat exchange, and enabling desorbed organic waste gas generated by the thermal desorption repair system to be fed into the combustion chamber through a backdraft waste gas guide-in unit for thermal combustion treatment. The method is carried out through a fuel oil combustion treatment all-in-one machine, and the all-in-one machine comprises a fuel oil supply unit, a fuel oil combustor, a combustion chamber, a secondary air supply unit and a backdraft waste gas guide-in unit. According to the combustion treatment method, conventional liquid fuel such as light diesel oil can serve as an energy source, the energy utilization efficiency is high, secondary pollution is controllable, system equipment is simple, safe, stable and reliable, and the combustion treatment method has the functions of combustion heat production and waste gas thermal combustion treatment.

Description

technical field [0001] The invention relates to a contaminated site remediation device used in the technical field of soil and groundwater remediation of polluted sites, in particular to a fuel combustion treatment method applicable to in-situ thermal desorption or pile-type thermal desorption remediation of polluted soil. Background technique [0002] Thermal desorption (Thermal Desorption) technology can be widely used in in-situ or ex-situ remediation of organic pollution sites such as volatile organic compounds, semi-volatile organic compounds, and petroleum hydrocarbons. This technology heats the polluted soil and / or groundwater to close to or even exceed the boiling point of the target pollutant through direct or indirect heating, and promotes the desorption, gasification, volatilization or increase of the flow of the target pollutant by controlling the system temperature and high temperature duration Supplemented by extraction means to separate and remove the target p...

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Problems solved by technology

[0005] At present, the engineering application of in-situ thermal desorption remediation technology or pile-type thermal desorption technology in domestic contaminated site remediation is still relatively limited. Injection heating desorption technology is easily restricted by geological conditions and the upper limit of target temperature, large-scale storage of gas in some sites has obstacles to government permits and high safety risks, high energy costs for heating, and high cost of desorption waste gas treatment, etc. kind of difficulty

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